IT1013361B - Impianto e metoodo di commutazione per telefonia multipla - Google Patents

Impianto e metoodo di commutazione per telefonia multipla

Info

Publication number
IT1013361B
IT1013361B IT51371/74A IT5137174A IT1013361B IT 1013361 B IT1013361 B IT 1013361B IT 51371/74 A IT51371/74 A IT 51371/74A IT 5137174 A IT5137174 A IT 5137174A IT 1013361 B IT1013361 B IT 1013361B
Authority
IT
Italy
Prior art keywords
switching method
multiple telephony
telephony
switching
Prior art date
Application number
IT51371/74A
Other languages
English (en)
Original Assignee
North Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North Electric Co filed Critical North Electric Co
Application granted granted Critical
Publication of IT1013361B publication Critical patent/IT1013361B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
IT51371/74A 1973-06-05 1974-06-04 Impianto e metoodo di commutazione per telefonia multipla IT1013361B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US367233A US3903372A (en) 1973-06-05 1973-06-05 Time division multiplex conferencing system

Publications (1)

Publication Number Publication Date
IT1013361B true IT1013361B (it) 1977-03-30

Family

ID=23446400

Family Applications (1)

Application Number Title Priority Date Filing Date
IT51371/74A IT1013361B (it) 1973-06-05 1974-06-04 Impianto e metoodo di commutazione per telefonia multipla

Country Status (4)

Country Link
US (1) US3903372A (it)
BR (1) BR7404623D0 (it)
CA (1) CA1033441A (it)
IT (1) IT1013361B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3997730A (en) * 1975-08-29 1976-12-14 Bell Telephone Laboratories, Incorporated Time division conference circuit
US4119807A (en) * 1977-06-13 1978-10-10 Rca Corporation Digital time division multiplex switching system
US4342111A (en) * 1980-11-18 1982-07-27 The United States Of America As Represented By The Director, National Security Agency, U.S. Government Digital bridging apparatus for telephone conferencing system
FR2498403A1 (fr) * 1981-01-21 1982-07-23 Telephonie Ind Commerciale Procede et dispositif de melange de signaux basse frequence transmis par des voies temporelles differentes vers un meme organe telephonique recepteur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3551600A (en) * 1968-02-23 1970-12-29 Stromberg Carlson Corp High capacity,high side-tone suppression,4-wire conference circuit
GB1234419A (it) * 1968-08-27 1971-06-03
US3617643A (en) * 1969-07-25 1971-11-02 Bell Telephone Labor Inc Time division switching system employing common transmission highways
US3692947A (en) * 1970-12-21 1972-09-19 Bell Telephone Labor Inc Time division switching system conference circuit
US3787630A (en) * 1972-07-31 1974-01-22 Bell Telephone Labor Inc Time division communication system

Also Published As

Publication number Publication date
US3903372A (en) 1975-09-02
CA1033441A (en) 1978-06-20
BR7404623D0 (pt) 1975-01-21

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